This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Lolu chungechunge lwabekwa kunqolobane. Uyacelwa ubuze umbuzo omusha uma udinga usizo.

Firefox browser issue?

  • 1 baphendule
  • 1 inale nkinga
  • 6 views
  • Igcine ukuphendulwa ngu FredMcD

bisanz14
bisanz14
more options

Hello, I recently signed on to learn Spanish with Duolingo. I've been working on it for 4 days and now when I try to log into Duolingo, I get the error message:

!Invalid JWT!eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJleHAiOjYzMDcyMDAwMDAsImlhdCI6MCwic3ViIjo4NTUyMTg1NzR9.Ep0V

I've tried clearing the cache and it does not help. I can open the site without issues in Google Chrome.

Any suggestions?

Thanks, Jeanne

Hello, I recently signed on to learn Spanish with Duolingo. I've been working on it for 4 days and now when I try to log into Duolingo, I get the error message: !Invalid JWT!eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJleHAiOjYzMDcyMDAwMDAsImlhdCI6MCwic3ViIjo4NTUyMTg1NzR9.Ep0V I've tried clearing the cache and it does not help. I can open the site without issues in Google Chrome. Any suggestions? Thanks, Jeanne

All Replies (1)

FredMcD
FredMcD
more options

Many site issues can be caused by corrupt cookies or cache.

Warning ! ! This will log you out of sites you're logged in to. You may also lose any settings for that website.

If there is still a problem,

Start Firefox using Troubleshoot(Safe) Mode {web link}

A small dialog should appear. Click Start In Troubleshoot(Safe) Mode (not Refresh). Is the problem still there?

While you are in Troubleshoot(Safe) mode;

Try disabling graphics hardware acceleration in Firefox. Since this feature was added to Firefox it has gradually improved but there are still a few glitches.

How to disable Hardware Acceleration {web link}